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        <title>OpenLayers Undo/Redo Drawing Methods</title>
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        <h1 id="title">Undo/Redo Drawing</h1>
        <p id="shortdesc">
            Demonstrates the use of undo &amp; redo methods while drawing. 
        </p>
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            <p>
                Use <code>Ctrl-Z</code> or <code>⌘-Z</code> to undo while drawing.  
                Use <code>Ctrl-Y</code> or <code>⌘-Y</code> to redo what you have 
                undone.  Use <code>Esc</code> to cancel the current sketch.
            <p>
                The <code>control.undo</code> method works on the current
                sketch, removing the most recently added point.  
                The <code>control.redo</code> method adds back items that were
                removed from an undo.  To fully erase a sketch, call the 
                <code>control.cancel</code> method.
            </p><p>
                View the <a href="draw-undo-redo.js" target="_blank">draw-undo-redo.js</a>
                source to see how this is done.
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